The customs agents were engaged in a bit of job action because they didn't like the wage increase offered them. I am not sure if this is still ongoing. If so it could increase your time. But usually it's quite fast. The first person checks your passport and then while you wait for your luggage another agent may come by and ask a few more questions. You should allow yourself 90 minutes from arrival at the gate to in the car.
Bring an umbrella...
What are you (and onesnowy) doing in our fair city?